Green’s Dictionary of Slang

1. fashionable, sophisticated, glamorous.

1947		Petaluma Argus-Courier (CA) 11 Aug. 4/3: The loop’s long-range gunners [i.e. baseball batters] could have a glitzy evening.
1962		Gazette (Montreal) 22 May 17/5: The sea of glitzy, nudie, precocious unimaginative LP sleeves.
1966		Tucson Dly Citizen (AZ) 29 Sept. 17/2: Glitz is the word used by the Pepsi-Cola Co. to describe the devilishly different flavor of [...] its new chocolate drink.
1978		N.Y. Times Mag. 3 Dec. 35: They can be seen [...] in glitzy restaurants, health clubs, tennis courts, theaters and bookstores.
1989		R.G. Barratt ‘So Why Doesn’t Jack the Lad Get a Real Job?’ in What Do You Reckon (1997) [ebook] Writing in Australia isn’t quite the glitzy, glamorous life it’s all cracked up to be.
1989		T. Blacker Fixx 107: He had begun to take an interest in my diversification into the glitzy world of entertainment.
1990		S. Morgan Homeboy 355: Maas’s voice reminded him of a glitzy game show host’s, at once snide and smarmy.
1998		R.G. Barrett Mud Crab Boogie (2013) [ebook] Stuff the glitzy resorts, see a bit of the real Australia.
1999		Guardian Guide 29 May–4 June 10: A recent glitzy shindig.
2006		W. Balliett N.Y. Voices 3: [Clubs] included the great ballrooms and dance halls (the Savoy, Roseland), glitzy pre-Las Vegas palaces (the Latin Quarter, the Copacabana).

2. (US campus) very capable.

1970

Current Sl. IV:2.